THIS WEEK'S CHALLENGE:Perform a 10-1 descending ladder of chest-to-bar pullups, then a 1-10 ascending ladder of box jumps. Do 10 reps of pullups, then rest as little as possible before doing another 9 reps. Continue this descending rep pattern (8 reps, 7 reps, 6 reps, etc.) all the way down until you're getting in one rep of pullups. Follow up with an ascending-rep pattern of box jumps (1 rep, 2 reps, 3 reps, etc.) all the way up until you hit 10 reps of jumps.